By Liv Banks • Published: May 2026
There is something so satisfying about turning a few chunks of juicy watermelon into a creamy frozen treat on a hot summer day. This watermelon sorbet Ninja Creami recipe is one of the easiest Ninja Creami recipes I make during warmer months.
It uses just 2 simple ingredients and still creates a refreshing, naturally sweet sorbet with incredible fresh watermelon flavor.
This watermelon sorbet Ninja Creami recipe is a simple homemade fruit sorbet made with fresh watermelon and sweetener, then frozen and spun in the Ninja Creami machine until creamy and smooth. Unlike traditional watermelon sorbet recipes that use added sugar or syrups, this version uses either monk fruit or allulose for a lighter frozen treat with fresh watermelon flavor.
The recipe also includes tips for fixing a crumbly texture after the first spin using the re-spin function and a small splash of water for a creamier consistency.
I personally love making homemade fruit sorbets this way because I can control exactly what goes into them. Otherwise, for me, it defeats the purpose of making homemade sorbet in the first place.
If you’ve ever struggled with icy or crumbly Ninja Creami sorbet before, don’t skip the texture tips and process photos below because they make a huge difference to the final result.
Why I Don’t Use Added Sugar
Traditional watermelon sorbet recipes often use agave syrup, maple syrup, or regular sugar. You can absolutely use those if you prefer.
Personally, I like keeping homemade frozen treats lower in refined sugar whenever possible. One of the best things about making your own Ninja Creami recipes at home is being able to control the ingredients yourself.
Watermelon already contains natural sweetness, especially if you use a ripe watermelon during peak season. I find that allulose or monk fruit gives enough sweetness while keeping the recipe lower calorie and lighter than many store-bought frozen desserts.
Ingredients You’ll Need
Fresh Watermelon
Use seedless watermelon chunks for the easiest blending. A juicy watermelon with deep color and natural sweetness works best.
If your watermelon contains black seeds, simply remove them before blending.
Sweetener Options
There are many options to sweeten this sorbet, but below are my two favorite ones:
- ¼ cup powdered allulose
OR
- ½ teaspoon pure monk fruit powder
Even though the amounts are very different, the final sweetness level is surprisingly similar.
I prefer powdered allulose over granulated because it blends more smoothly into the fresh watermelon.
You can use other sweeteners too, like maple syrup, honey, coconut sugar, or even unfrefined raw sugar; just add about 2 tablespoons of either sweetener. Remember, a good ripe watermelon is already sweet; you just need a little extra to make it taste like a proper dessert.
How To Make Watermelon Sorbet In The Ninja Creami
Step 1: Fill The Pint With Watermelon
Add fresh watermelon chunks into the Ninja Creami pint container until you reach close to the max fill line.
At this stage the watermelon cubes sit higher in the container because there are still air gaps between the chunks.
Step 2: Blend Until Smooth
Add your sweetener directly into the pint and use a stick blender to blend the watermelon into a smooth puree.
Once blended, the volume will naturally settle and drop below the fill line because the air spaces between the watermelon chunks disappear.
This is completely normal.
Top the pint up with a few more watermelon cubes and blend again briefly until the sorbet base reaches the max fill line.
This is the perfect way to fully use the Ninja Creami pint container without overflowing.
Step 3: Freeze On A Level Surface
Place the storage lid on the pint and freeze for at least 24 hours on a level surface.
The sorbet base should be frozen completely solid before spinning.
Step 4: Spin the sorbet
Remove the storage lid and place the pint into the outer bowl of the Ninja Creami machine.
Attach the outer bowl lid assembly and lock it into the motor base according to your Ninja Creami ice cream machine instructions.
Select the sorbet function and allow the machine to spin.
Why The Sorbet Looks Crumbly After The First Spin
Don’t panic if your watermelon sorbet looks powdery or crumbly after the first spin.
This is extremely common with fruit sorbets because watermelon has such high water content.
I actually photographed this stage because many people assume they did something wrong the first time they make fruit sorbets.
The texture at this stage is usually still too frozen and compact.
Here’s what to do to fix this 👇🏻
The Simple Trick That Creates Creamy Sorbet
Add about 2 tablespoons of water directly into the crumbly sorbet before pressing the re-spin button.
This small amount of water helps loosen the frozen ice and allows the Ninja Creami machine to create a much creamier texture.
After the re-spin cycle, the watermelon transforms into a smooth, scoopable sorbet with delicious fresh watermelon flavor.
This was honestly the biggest texture difference I noticed while testing this recipe.
The Simple Trick That Creates Creamy Sorbet
After re-spinning, the texture should look creamy, smooth, and easy to scoop.
If your sorbet still looks too powdery, simply run another re-spin cycle.
Every watermelon is slightly different depending on water content and sweetness.
Try These Ninja Creami Recipes Next
If you enjoyed this watermelon sorbet recipe, you might also like:
- mango sorbet
- lemon sorbet
- orange sorbet
- dairy-free Ninja Creami recipes
- other healthy Ninja Creami recipes
Once you learn the basic sorbet method, it becomes a great way to experiment with different fresh fruit combinations all summer long.
Watermelon Sorbet Ninja Creami Recipe
Equipment
Ingredients
- 3 cups seedless watermelon bite sized cubes
- ¼ cup powdered allulose
OR
- ½ teaspoon pure monk fruit powder
Optional:
- 1 tablespoon fresh lime juice
- 2 tablespoons water for re-spin if needed
Instructions
- Add fresh watermelon chunks into the Ninja Creami pint container until close to the max fill line.
- Add the sweetener and use a stick blender to blend the watermelon into a smooth puree directly inside the pint.
- Once blended, the volume will naturally settle below the fill line. Top up with a few more watermelon chunks and blend again briefly until the mixture reaches the max fill line.
- Place the storage lid on the pint and freeze on a level surface for at least 24 hours until fully solid.
- Remove the lid, place the pint into the outer bowl assembly, lock into the Ninja Creami machine, and process using the sorbet function.
- If the sorbet looks crumbly after the first spin, add about 2 tablespoons of water and press the re-spin button.
- This helps loosen the frozen ice crystals and creates a much creamier texture.
- Scoop and enjoy immediately for the best creamy consistency.
Notes
Nutrition
Got extra watermelon leftover?
After making a pint or two of this refreshing Ninja Creami watermelon sorbet, you might still have some watermelon leftover.
Why not try my simple watermelon feta salad, a great side dish for dinner tonight?
FAQs
Can I use regular sugar?
Yes. If you prefer, you can use regular sugar, agave syrup, or maple syrup instead of monk fruit or allulose.
Why is my sorbet crumbly?
Fruit sorbets often look crumbly after the first spin because of the high water content in fresh fruit. Adding a splash of water and re-spinning usually fixes the texture.
Can I make this with frozen watermelon?
Fresh watermelon works best because it blends more easily into a smooth sorbet base before freezing.
Is this recipe low-calorie?
Yes. Since it contains mainly fresh watermelon and a small amount of sweetener, it is naturally lower in calories than many traditional frozen desserts.
Can I make this without a food processor or stick blender?
You need a blender to smooth out the watermelon chunks before freezing. Frozen cubes of watermelon are not good for the Ninja Creami machine. An evenly leveled surface is best.
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